The efficiency & comfort you need & the space you occupy greatly influence the decision for the cooling product you get. I have worked in office management for the past decade & have l acquired so much about choosing an efficient Heating & Air Conditioning unit that would produce high efficiency & last a long time. Last summer, I was managing an office building & observed that it would get sweltering though the people I was with and I had a functioning quality a/c. A meeting with the cooling workman from the local a/c supplier left me thinking of the best unit for the identifiable office building. The people I was with and I settled on a central a/c unit. The benefits the unit provided were enough for me to make a decision. I hired a/c experts to handle the a/c install. Besides providing indoor comfort, this unit can clean the air, so there is no need for an indoor air-cleaning system. Because the new idea also has ducts running through the office, I gained training from the cooling tech on how to change the air filters separate from the assistance of a professional to save repair costs. The a/c repair book I gained from the professionals showed that the a/c tune-up requirements were almost similar to several systems, including scheduling common a/c repairs to maintain the optimal unit function. One of the advantages of this idea is that it is quiet, & you barely notice its presence. You can also use this idea all year round as it provides warmth during winter. You get value for your currency. It is also genuinely affordable for all the benefits it comes with.